The navigator says to the captain "Sir! I've spotted an inhabited planet!"
Captain replies "After all this time! I was beginning to lose hope. What can you tell me about it?"
"Well, sir, it's definitely inhabited by intelligent life. I'm getting all kinds of communications traffic. The atmosphere will support human life but it's going to smell kinda funny. There's a high concentration of methane."
"Great. We travel 500 light years to find a planet based on 'pull my finger' jokes."